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UFL/COEL-90/009
PERDIDO KEY BEACH NOURISHMENT PROJECT:GULF ISLANDS NATIONAL SEASHOREFirst Progress Report
by
Paul WorkLi-Hwa LinRobert G. Dean
August 27, 1990
Submitted to:
Department of the NavySouthern DivisionNaval Facilities Engineering CommandCharleston, SC 29411-0068
REPORT DOCUMENTATION PAGEI1. Report fo. 2. 3. Ieciplast 's Accesloon o.0
4. Title sod Subtitle 5. Iport Date
PERDIDO KEY BEACH NOURISHMENT PROJECT: GULF ISLANDS August 27, 1990NATIONAL SEASHORE 6.First Progress Report7. A•tor(.) Paul Work . rerfonmia Ornglsztio Leaort o.
Li-Hwa Lin UFL/COEL-90-009Robert G. Dean
9. ?PerTfoing Organisatioe Ia* end Address 10. ProJect/Task/Uork Unit No.
Coastal and Oceanographic Engineering DepartmentUniversity of Florida 11. contract or Gr.at No.336 Well Hall336 Weil Hall N62467-89-C-0500Gainesville, FL 32611 13.
13. Typ of Ireport12. Spoaeoring OrgSntiatloM Name and Address
Department of the Navy First Progress ReportSouthern DivisionNaval Facilities Engineering CommandCharleston, SC 29411-0068 14.
15. Supplementary Notes
16. Abstract
This progress report encompasses the period November 15, 1989, to August 17, 1990,documenting a beach monitoring project at Perdido Key, Florida. Dredging of Pensacola
Pass, contracted by the U.S. Navy, is presently underway, with the dredge spoil serving
as material for nourishment of much of the gulf-side beach lying within the Gulf Islands
National Seashore on Perdido Key. The predecessor to this report (Work et al., 1990)provides greater detail regarding the scope of the nourishment project, and includes pre-
nourishment beach profile data and sand sample analyses. This report documents work done
since the pre-nourishment survey, including installation of instrumentation and collection
and analysis of wave, current, tide, and meteorological data.
17. Originator's Key Words 18. Availablity Statement
Beach nourishmentSediment transportShoreline response
19. U. S. Security Classtf. of the Report 20. .S. Security Classif. of This Page 21. No. of Pages 22. Price
Unclassified Unclassified 45
UFL/COEL-90-009
PERDIDO KEY BEACH NOURISHMENT PROJECT:
GULF ISLANDS NATIONAL SEASHORE
First Progress Report
Submitted to:
Department of the Navy
Southern Division
Naval Facilities Engineering Command
Charleston, SC 29411-0068
Prepared by:
Paul Work
Li-Hwa Lin
Robert G. Dean
Coastal and Oceanographic Engineering Department
University of Florida
Gainesville, FL 32611
August 27, 1990
TABLE OF CONTENTS
1 Introduction 3
2 Wave, Current, and Tide Data Collection 3
2.1 Installation and Instrumentation Description .................. 3
2.2 Data Analysis ..................... .............. 7
3 Additional Tide Data Collection 8
4 Meteorological Data Collection 8
5 Summary 10
6 Reference 10
APPENDIX I: Wave Data I-1
APPENDIX II: Current and Tide Data II-1
APPENDIX I: Additional Tide Data III-1
APPENDIX IV: Meteorological Data IV-1
2
PERDIDO KEY BEACH NOURISHMENT PROJECT:GULF ISLANDS NATIONAL SEASHORE
First Progress Report
1 Introduction
This progress report encompasses the period November 15, 1989, to August 17, 1990,
documenting a beach monitoring project at Perdido Key, Florida. Dredging of Pensacola
Pass, contracted by the U.S. Navy, is presently underway, with the dredge spoil serving
as material for nourishment of much of the gulf-side beach lying within the Gulf Islands
National Seashore on Perdido Key (Figures 1 and 2). The predecessor to this report (Work
et al., 1990) provides greater detail regarding the scope of the nourishment project, and
includes pre-nourishment beach profile data and sand sample analyses. This report docu-
ments work done since the pre-nourishment survey, including installation of instrumentation
and collection and analysis of wave, current, tide, and meteorological data.
Correspondence with the Mobile District of the U.S. Army Corps of Engineers has
suggested that the beach nourishment project should be completed by early September,
1990. A second beach profile survey will be conducted shortly after completion of the
nourishment project. Sand samples will also be collected during the post-nourishment
survey. Subsequent surveys will then be conducted once per year and, if possible, following
severe erosional events.
2 Wave, Current, and Tide Data Collection
Installation and Instrumentation Description
On January 18, 1990, a directional wave gage was installed directly offshore of the Gulf
Islands National Seashore ranger station on Perdido Key, at a depth of approximately 7 m
below mean sea level. The gage is entirely self-contained, having all circuitry, a tape drive,
3
cp447..- ·.. o. *. _ .v ^\ ,: 'yY ". o * s t * >
·- s- ss- nWi"-
:2 ,
o0 5 km
Figure 1. Site Location Chart.
0 O 1 2 3 4 5kmMeteorological I , . 1 ,
Station
n- 0\ 3 :' \ Tide GageR-30 R-35 -40 R-4 5 R-50 R-55
..- o| ..
,- .
+ '/ : + --.R -60. -: . I I I I4 -65
, I I Il I I I I I I I 1i ,.1-
Approximate I I1 1pponate Directional Wave Gage Recommended BeachWesterly Park NourishmentBoundary
NOTE:R-40 Is Florida Department of NaturalResources Monumented "Range 40"
Figure 2: Components of Beach Nourishment Monitoring Project.
Pressure CurrentSensor Meter
I • •._ Housing for tape driver,batteries, electronics
SSteel I-Beams
k 2.4m-,
Figure 3: Schematic of Wave Data Collection Device.
digital compass, and battery power sealed within a watertight cylinder. This cylinder is
bolted in a vertical position to a heavy steel tripod which is anchored to the seafloor by
jetted piles (Figure 3). A pressure sensor and an electromagnetic current meter are mounted
on the top end of the cylinder. Signals from the pressure sensor and current meter are
recorded on a magnetic tape for subsequent analysis. The unit has sufficient data storage
and battery power to be left in place for periods of up to three months without servicing,
however, usually it is desirable to service the unit more frequently.
The final permit for installation of the wave gage was issued by the Department of
Natural Resources, State of Florida, on December 13, 1989. The gage will later be hard-
wired to shore, which will allow data to be screened as it is collected and provide for early
detection of instrumentation difficulties.
This report contains wave data recorded by the self-contained wave gage from the date
of installation (January 18, 1990) to April 15, 1990. Available storage on the magnetic tape
6
on which the data are recorded was exhausted on April 15. The gage was retrieved May 2,
1990, and replaced with a fresh unit that remained in place until August 8, 1990. A gap
in the data set therefore exists for the period April 15-May 2, 1990. A fresh package was
installed August 8, 1990, and will remain in place through October.
Data Analysis
Wave data are not collected continuously. Every six hours, a 17-minute record of the
water pressure and the two horizontal components of velocity is collected, using a sampling
rate of 1 Hz, resulting in a time series of 1024 data points. The pressure time series is used
to determine the energy spectrum of the sea, from which the significant wave height and
representative wave period are obtained.
Significant wave height is classically defined as the average of the highest one-third of
the waves in the sample, but, assuming a narrow-banded energy spectrum (narrow-banded
in the frequency domain), it is typically defined as follows:
H, = 4 o (1)
where H, = significant wave height
mo = zeroth moment of the energy spectrum (i.e. area under the
energy spectrum)
The representative wave period, Tm, presented in this report is defined as the period corre-
sponding to the peak of the energy spectrum.
The two components of velocity recorded by the electromagnetic current meter are used
to detect the presence of any mean currents (Uc) and determine the central direction (0)
and spreading parameters (S 1 , S2 ) of the sea. The determination of the wave direction
makes use of the fact that the orbits of the water particles under a wave are aligned with
the direction of travel of the wave. The central direction is the primary direction of the
waves at the frequency corresponding to the peak of the energy spectrum.
The spreading parameters are governed by the directional distribution of the waves; a
7
unidirectional sea will have large values for the spreading parameters, while a very "con-
fused" sea will have low values for the spreading parameters.
Appendix I presents the representative wave period (Tm), significant wave height (H,),
central direction in which the wave is heading (9), and the spreading parameters (S1, S2),
for the time period monitored. It is seen that, over the interval of available wave data, there
were six storms with significant wave heights exceeding one meter.
Appendix II contains plots showing the magnitude of any mean current (Uc), its direc-
tion (0c), and the stage of the tide. The mean current and tidal stage are computed by
averaging each sample of, respectively, velocity'and pressure data, over its entire 17-minute
record. Note that this method for determination of tidal stage assumes negligible variation
in atmospheric barometric pressure.
3 Additional Tide Data Collection
Although not included in the project contract, in response to a request by the National
Park Service, a long-term tide gage was installed January 30, 1990, on a piling of the Ft.
Pickens pier near the Gulf Islands National Seashore Headquarters, near the northwest tip
of Santa Rosa Island (see Figure 2 for location). The tide gage consists of a surface-piercing
stilling well housing a float attached to a graduated tape. The tape drives the drum of a
mechanical strip chart recorder. The charts on this unit are changed weekly by National
Park Service personnel. Data from this gage are presented in Appendix III. Data were
available only through June 8, 1990.
4 Meteorological Data Collection
A mechanical weather station was installed and began collecting meteorological data on
January 29, 1990, near the Gulf Islands National Seashore ranger station on Perdido Key
(Figure 2). This unit was in place until June 24, 1990, recording wind speed, direction and
air temperature data. It was replaced June 24, 1990, by a new weather station that also
8
Figure 4: Mechanical Weather Station.
measures and records rainfall rates and "wetness".
The first weather station installed is Model 1071, manufactured by Meteorology Re-
search, Inc. (464 W. Woodbury Rd., Altadena, CA). It consists of a simple windvane
and cup-type anemometer, mounted atop a cylinder which houses a clock and strip chart
recorder (Figure 4). A continuous record of wind speed, wind direction, and air temper-
ature is available on the resulting stripchart. Daily average wind speeds, directions, and
temperatures from the mechanical weather station are presented in Appendix IV. Data for
March, 1990, were not available.
The new, digital weather station records wind speed and direction, temperature, rainfall
amount, and wetness once per hour. The unit stores twenty-four readings in memory, and
then automatically phones a computer at the University of Georgia in Athens, Georgia,
to transfer the data. The digitized data can then be easily transferred by phone line and
modems, or by some other electronic medium, and data analysis initiated.
9
5 Summary
The project is proceeding with data collection and analysis reasonably on schedule. Post-
nourishment surveys will be conducted soon after completion of the dredge material place-
ment.
6 Reference
Work, P.A., Lin, L.-H., and Dean, R.G. "Perdido Key Beach Nourishment Project: Gulf Is-
lands National Seashore. Pre-Nourishment Survey, Conducted October 28-November
3, 1989." Coastal and Oceanographic Engineering Department, University of Florida,
Gainesville, Florida. April 30, 1990. UFL/COEL 90-006.
10
APPENDIX I
WAVE DATA
January 18-April 15, 1990
Notes: 1) Mean wave direction, 0, is the direction toward which the wave is heading.2) Horizontal axis denotes day of month.
PERDIDO KEY20
15 -SIs
Tn 10(SEC)
1 5 10 15 20 25 30
3
Hs 2
(M)
1
1 5 10 15 20 25 30
H+
N -
8 E
S
H I I I I II I I I I I I I I I I I I I I I I I I I I I I I
1 5 10 15 20 25 30
120
* Sl:+ S2:o90
S 60 -S0 0 0^ o
30 o0 o 0 o
o I I I I I 1 I I 1 1 I I I I .Ij+ I I i ,^l. I I I•
1 5 10 15 20 25 30
JRN..1990
Figure I-i: Representative Period, Significant Wave Height, Central Direction, and Spread-ing Parameters, January, 1990. I-2I~Z2
PERDIDO KEY20
15
Tn 10(SEC)
0 I I I I i . . . . . . . . . . . .1 5 10 15 20 25 28
3
Hs 2(M)
1 5 10 15 20 25 28
+ +++-
8 E
S
1 5 10 15 20 25 28
120
S1:+ S2 :e90 -
S 60 €
S5 10 15 20 25 28
FEB.1990
Figure 1-2: Representative Period, Significant Wave Height, Central Direction, and Spread-ing Parameters, February, 1990.-3
/ -
PERDIDO KEY20
15
(SEC)
1 5 10 15 20 25 30
3
Hs 2(MI
0 j1 5 10 15 20 25 30
H + i ------ +-- I-4+--41----+W-
+ + +4 ;+4*H4oL~4±.d+4it + *It4N +
++8E ++
+ ++
S +
SI I 11 41 1 1 1 1 1 1 1111111.11 1111 IIItI
1 5 10 15 20 25 30
120
Si:+ S2:o90
S 60 0S3 -0
30
0 1 0 I I
1 5 10 15 20 25 30
MRR. .1990
Figure I-3: Representative Period, Significant Wave Height, Central Direction, and Spread-ing Parameters, March, 1990.
I-4
PERDIDO KEY20
15 -
Tn 10(SEC)
5
1 5 10 15 20 25 30
3
Hs 2(M)
1
1 5 10 15 20 25 30
w+ + Ljk4N- ++
8 E-
S-
H I l I I I I I I I I I I I I I I I I I I I I I I I I 1
1 5 10 15 20 25 30
120 ,
S 1:+ S2 :oSO9 -
S 60 -
00
&0 .o * *
1 5 10 15 20 25 30
APR. .1990
Figure 1-4: Representative Period, Significant Wave Height, Central Direction, and Spread-
ing Parameters, April, 1990. I-5I-5
APPENDIX II
CURRENT AND TIDE DATA
From Offshore Gage
January 18-April 15, 1990
Notes: 1) Mean current direction, 0c, is the direction toward which the current is heading.2) Horizontal axis denotes day of month.3) Tidal datum is mean sea level.
PERDIDO KEY1.0
0.8
Uc 0.6 -
(M/S)0. -
+* +
0.2 -+ - +
o.o , , , , , I i i I i i . . i i ' i wi + + ,-+- , +, , -4 -, +T" T f-
5 10 15 20 25 30
++ 40+ + -- + ++
N + + + + ++ +
(DEG) +
+ +-I ! I I I I I I I ! I ! l " "l +l + 4-+
N II I t I I I I I tII I I I I 1 14, 1+ I1 5 10 15 20 25 30
1TIDE(MI 0
-1
-2 I I I I I I I II I I I I I I I I I I I I I I I I
1 5 10 15 20 25 30
JRN..1990
Figure II-1: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage,January, 1990. II-2
PERDIDO KEY1.0 MI1 i
0.8
+
Uc 0.6 +
(M/S) +
0.4t
+ ++ +0.2 -+ + +
+ + + 4-
1 5 10 15 20 25 28
- + + 4+ +++ + + + +
+N - + + + + + + + ++I + + ++ ++ ++ +++41- + + + +++ ++
' E + + + *+ +^. 4- - +(DEG) + + -+o # ..+ + +
+ + +
H i I r- II 1 i, 1 .4-+1 1 I i 1- I I I I I " I I I I I
1 5 10 15 20 25 28
1 -
(M ° 0
-1 -
-2
1 5 10 15 20 25 28
FEB..1990
Figure II-2: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage,February, 1990.-3
II-3
PERDIDO KEY1.0 III
+
0.8 -
Uc 0.6 -(H/S)
0. -
1 5 10 15 20 25 30
S+ + + + +
(DEG)++ + + + ++
*-4"4 E + ++ + +.. + + . -b- .
,.,+.++ +- ++ +
+ +
N I ' i i I ' . i t t L i. 0 1 t t ' t ' ' ' ' ' 1 1 ,1 1 1 1 t 11.20
1 5 10 15 20 25 30
1+ - +4
TIDE0)
S-
1 5 10 15 20 25 30
MRR. ,1990
Figure II-3: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage,March, 1990.-4
II-4
PERDIDO KEY1.0 - I
0.8
Uc 0.6 - +
(M/S)0. -
+
0.2 - ++ ++/ * ++**+ + + ++ + * e 41++ 44- +.,-. +4+.,++.,.+
0.0 •4.It I+ 1 i. 1 I I 4- ,1 I 111111I I i
1 5 10 15 20 25 30
+ + ++N - + ++ +
S+ ++ +
sc E +- " "++ ++
1 --
(DEG) + + + +
S- s++ +
w +I
1 5 10 15 20 25 30
2
-1
-21 5 10 15 20 25 30
RPR. .1990
Figure II-4: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage,April, 1990. I-5
11-0
APPENDIX III
TIDE DATA
From Pier-Mounted Gage, Santa Rosa Island
February 16-June 8, 1990
Notes: 1) Time scale is in days; i.e. Day=7 denotes the end of the 7th day of the month.2) Tidal stage is referenced to National Geodetic Vertical Datum (NGVD).
Perdido Key
1.0 i ' ' '
0.8
0.6
0.4
6 0.2
< 0.0
E -0.2
-0.4
-0.6
-0.8
-1.0 ' ' ' ' ' I i 1i 1 i I , I ' , I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
1.0
0.8
0.6
0.4
6 0.2
a 0.0
i -0.2
-0.4-
-0.6
-0.8
-1.015. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
February, 1990
Figure III-1: Tidal Curve, February, 1990.
III-2
Perdido Key
1.0 ' i ' i ' '
0.8
0.6
0.4
E 0.2
S0.0
i -0.2
-0.4
-0.6
-0.8
- 1.0 ' ' I , I I I a I , I , I , I , i
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
1.0 i I i i i i i i i *
0.8
0.6
0.4
E 0.26 0.0
- -0.2
-0.4
-0.6
-0.8
-1.0 I I15. 16.17.18. 19.20.21.22.23.24.25.26.27. 28. 29. 30.31.
Day
March, 1990
Figure III-2: Tidal Curve, March, 1990.
III-3
Perdido Key
0.8
0.60.4
0 0.2 -
S0.0
E -0.2
-0.4
-0.6
-0.8
-1.0 ' ' ' ' ' ' ' '
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
1 .0 i i I i I i I i I I i I I i i I
0.8
0.6
0.4
0 0.2
" 0.0
E 0 -0.2
-0.4
-0.6
-0.8
- 1 .0 " I ' i ' , ' I ' I ' I ' I '
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
April, 1990Figure III-3: Tidal Curve, April, 1990.
III-4
Perdido Key
1.0
0.8
0.6
0.4
E 0.2
S0.0
E -0.2
-0.4
-0.6
-0.8
-1.0 ' I I I I I i t ' t '0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
1.0 i I ' i , i I i i I '
0.8
0.6
0.4
E 0.2
S0.0
i -0.2
-0.4
-0.6
-0.8
-1.0 ' ' ' ' ' '
15.16.17.18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
May, 1990
Figure III-4: Tidal Curve, May, 1990.
III-5
Perdido Key
1.0 ' I ' I I I I I i j I I i I i I i I i
0.8
0.6
0.4
S 0.0 2-0.2
T 0.0
E- -0.2
-0.4
-0.6
-0.8
-1.00. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
1.0
0.8
0.6
0.4
6 0.2
S0.0
e -0.2
-0.4
-0.6
-0.8- 1.0 ' ' ' ' ' ' ' ' I ' '
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
June, 1990Figure III-5: Tidal Curve, June, 1990.
III-6
APPENDIX IV
METEOROLOGICAL DATA
January 29-August 16, 1990
Notes: 1) Time scale is in days; i.e. Day=7 denotes the end of the 7th day of the month.2) Wind direction is the direction from which the wind originates, measured
clockwise from magnetic north.
Perdido Key
7 10 . " ' I I I ' I I I I I I I I I I I I I I . I | I I9.
E 8.7.
S 6.5 . --
4 4.S3.o 2.
0.O . ' ' I I I , I , I t I i I t I i I i I , I i I t I , I t
15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.Day
360.
3 270.
• 180.
: 90.
0.0 . ' I I I I i i I I I i I i i I t I I i i i i
15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.Day
45. i i i i i i0 40.0 35. -
S30. -S25.
5 20.E- 15.. 10. -.< 5.
0.15. 16. 17. 18. 19.20.21.22.23. 24. 25.26.27.28.29.30. 31.
Day
January, 1990Figure IV-1: Wind Speed, Wind Direction, and Air Temperature, January 15-31, 1990.
IV-2
Perdido Key
C 1 0 . I I I I I I I I I I ' I '
s . -6 8.
7.
Day4.3603.S 2.
• 270. -
• 18.S 0. -
o0. ' ' ' ' ' ' ' ' ' ' ' ' ' * '
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
360.S270.
S905.
<x 5. -
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
45.U 40.0 35.
SI30.S25.5 20.
5.0.
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
February, 1990Figure IV-2: Wind Speed, Wind Direction, and Air Temperature, February 1-15, 1990.
IV-3
Perdido Key
N 9.E 8.
7.I 6.
5.4 4.3.
S2. -
0. ' ' ' '15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
360. I I I I
Z 270.
- 180.
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
45.S40.
0 35.S30.2 25.
5 20.E- 15.S10.
5.0.
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
February, 1990
Figure IV-3: Wind Speed, Wind Direction, and Air Temperature, February 15-28, 1990.
IV-4
Perdido Key
10,9. -9
6 8.7.
a 6.
C 2. -
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
360.
0§ 270.
S180.
c 90.
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
45.S40.
o 35. -S30.-S25.
o 20.E- 15 .. 10.
S5.0.
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
April, 1990Figure IV-4: Wind Speed, Wind Direction, and Air Temperature, April 1-15, 1990.
IV-5
Perdido Key
s 9.8 8.
S7.
S6. -S5.- -4 4.
3. -. 2 -
1.0.
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
360. - -
S270.
180.
. 90.-
0.15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
45.) 40.
o 35. -S30. -E 25.
20. -15. -10. -
< 5. -0.
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
April, 1990
Figure IV-5: Wind Speed, Wind Direction, and Air Temperature, April 15-30, 1990.
IV-6
Perdido Key
10. I ' *S9. -
3 8.7.
d 6.5.
,~3.C 2 -8 1. -
0.
* 0 . ' ' I I t I t I I I I t I , I , I t I t I t I t ' t
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
360.
0: 270.
180.
I 90.
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
45. I I IS 40.0 35.S30.
25.S20.
E 15.
"< 5. -S10.
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
May, 1990
Figure IV-6: Wind Speed, Wind Direction, and Air Temperature, May 1-15, 1990.
IV-7
Perdido Key
10 I I I I I I I ' I I I I I' .9.E 8.
c 3.r 2.
0.15. 16. 17. 18. 19.20.21.22.23. 24.25.26.27.28.29.30. 31.
Day
360.
Z 270.
180.
a 90.
0.15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30. 31.
Day
45. I Iu 40.a 35.
" 30.-S25.
a 20.E- 15.S10.-< 5. -
0. I15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
May, 1990
Figure IV-7: Wind Speed, Wind Direction, and Air Temperature, May 15-31, 1990.
IV-8
Perdido Key
a 6.
s 2.1.-0o ' ' ' I ' I ' I ' I ' I ' I' ' I I I I ' I '
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
. .2 270.
180.
a 90.
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
45. a0 40.0 35.S30-S25. -
0 20.15. -
. 10.S 5.
0 . ' f I a I I ' I a I a I a I I I a I a I a
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
June, 1990
Figure IV-8: Wind Speed, Wind Direction, and Air Temperature, June 1-15, 1990.
IV-9
Perdido Key
10.
9.
8.
7.
- 6.
S5.
3.
2.
1. -
0.15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
360 . i I I i I I i i I i i I I I I
f 270.0,
• - 180.V
90.
0.
0. , III tII I I I I I i I 1 I15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26.27. 28. 29. 30.
Day
June, 1990
Figure IV-9: Wind Speed and Direction, June 15-30, 1990.
IV-10
Perdido Key
45.S40.
0 35.-30.
S25.S20.E 15. -. 10.
5. -
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
i.4 10 . i I i I1 I I I I 1 1 1 I 1 I 1 | 1 I I I I1 - - I - -• 9.' 8. - -
- 7.6 6.S5.M4.
4 3 3.
2. 2.
S0. I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.Day
30. I
25.
o20.
.15.Q): 10. -
5.
0 . I I II I I I f Ir I I I I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27.28.29. 30.Day
June, 1990
Figure IV-10: Air Temperature, Rainfall, and Wetness, June 15-30, 1990.
IV-11
Perdido Key
10.
9.
8.
7.
6.
= 5.
2.
1.
0. i
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.12. 13.14. 15.
Day
360.
S 2 70 .
180.
90.
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
July, 1990
Figure IV-11: Wind Speed and Direction, July 1-15, 1990.
IV-12
Perdido Key
45.S40.-
S35..30.
525.w20. -E15. -
S10. -< 5. -
0.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
- 10.q 9.
N 8. -S7.6 6. -S5.
4.3 3.S2.
0 1 -, ,
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
30. '
25.i 20.
15.
0.5. -0. F , "
I I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
July, 1990
Figure IV-12: Air Temperature, Rainfall, and Wetness, July 1-15, 1990.
IV-13
Perdido Key
10 . i i i i i i i| i | I
9.
8.
S7. -
6.
S45.
2.
1. tI
15. 16. 17. 18. 19.20. 21.22.23.24.25.26.27.28.29.30.31.
Day
360. I i I
C 270.0o
180.
90.
0 . Ii I I
15. 16. 17. 18. 19.20. 21.22.23.24. 25.26.27.28.29.30. 31.
Day
July, 1990Figure IV-13: Wind Speed and Direction, July 15-31, 1990.
IV-14
Perdido Key
45 . i I I ' Ii I i i IS40. -o 35..30.S25.S20.
E-15. -. 10.< 5.
15. 16. 17. 18. 19.20.21.22.23. 24.25.26.27.28.29.30.31.Day
. 10. I I II I I '1' I i I I 'I I I rI8 9. -
> 8.6 7. -6 6.
5.S4.
10. 1S 0.: ' ' 'I 'I " " ' ' I ' I ' 'I I I ' I ' * ' '
15. 16. 17. 18. 19.20.21.22.23.24. 25.26.27.28.29.30. 31.
Day
30. I I , , I I
25.
S20.
0.
5.
15. 16. 17. 18. 19.20.21.22.23. 24. 25. 26.27.28. 29.30. 31.Day
July, 1990
Figure IV-14: Air Temperature, Rainfall, and Wetness, July 15-31, 1990.
IV-15
Perdido Key
10 . I I I I IJi I I I I I
9.
8.
7.
6.6. -1 --
8 5. -
3.
2.
1. -
0 . I I I , I I I I I I I p I I I I - I - I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
360. r
S270.0
180.
90.
0 . I I I I I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
August, 1990Figure IV-15: Wind Speed and Direction, August 1-15, 1990.
IV-16
Perdido Key
) 40.0 35.
730.25. -
§20. -E 15.
0.5. -0 . I I I I , I , I i I I I I I I 1 I I I I I i I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.Day
0. 'a 9.
S8.S7. -S6.
5.
-3.S2.
0 .0 I I I , I i i I I i I I i I i I i I I I I I I 10.0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
25.
S20.
.15.
S10.
5.
0. 1 1 i I i I m In0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.12. 13. 14. 15.
Day
August, 1990
Figure IV-16: Air Temperature, Rainfall, and Wetness, August 1-15, 1990.
IV-17
Perdido Key
10. i ' i
9.
8. -
7. -
S6.
) 3.
2.
1.
15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
360. I I '
g 270.0o /
S180. -
90.
0.15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
August, 1990Figure IV-17: Wind Speed and Direction, August 15-31, 1990.
IV-18
Perdido Key
4 5 . i i- i- i ' i '1 " i ' ,
S40.0 35.-'30.
c25. -S20.S15. -
. 10.< 5. -
0 i l i i i i i I i Ii i i i I i it i I • r i
15. 16. 17. 18. 19.20. 21.22.23.24.25.26. 27.28.29.30.31.Day
S .1!0 . I I ' 1 r I ' I ' I ' I ' 1 ' 1 ' I ' 1 I I ' I 1 I ' I a9. -
S8.-6 7.6 6.
- 5-4.
-3.. 2.
0.15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
30 . i I I I i i
25.
20.
, 15.
£ 10.5.
0.15. 16. 17. 18. 19.20.21.22.23. 24.25.26.27.28.29.30.31.
Dey
August, 1990
Figure IV-18: Air Temperature, Rainfall, and Wetness, August 15-31, 1990.
IV-19